The cost of installing solar panels yourself will depend on a number of factors, including the size of your solar panel system, the materials and equipment you need, and any local permits or inspections that may be required.

Here are some rough estimates of the costs you might incur when installing solar panels yourself:

• Solar panels: Solar panels typically cost between $2.50 and $3.50 per watt, so a 6 kW system (which is about the average size for a home) would cost between $15,000 and $21,000.

• Inverter: An inverter is necessary to convert the direct current (DC) electricity produced by the solar panels into alternating current (AC) electricity that can be used in your home. Inverters typically cost between $1,000 and $3,000.

• Mounting hardware: You'll need mounting hardware to attach the solar panels to your roof or a ground-mounted system. Mounting hardware can cost between $500 and $1,500.

• Wiring and electrical work: You'll need to have the wiring and electrical work done by a licensed electrician, which can cost between $500 and $1,500.

• Permits and inspections: You may need to obtain permits and have inspections done by your local building department, which can cost anywhere from a few hundred dollars to several thousand dollars.

In total, it is possible to install a solar panel system yourself for around $20,000 to $30,000, depending on the size of the system and the specific costs in your area. However, it's important to note that installing solar panels is a complex and technical process that requires a high level of knowledge and expertise. If you are not confident in your ability to properly install the system, it is generally recommended to hire a professional solar installation company.